Need some help - weight of a Beretta factory 15 round magazine?

[Apec]

Hello calgunners,

Does anyone here know how much a 15 round Beretta factory magazine weighs?

The reason I ask is because I sold the last of my rebuild kits in a package of 6 to a buyer via gunbroker. Said buyer claims I only shipped him 5. I'm first going to check that against the weight on my receipt, since I shipped USPS priority with a small flat rate box.

Thanks.

[Lead Waster]

you should weight that one that you forgot to ship him!

Just kidding, sorry.

How could you account for the weight of the packing?